Pennsylvania Railroad class AA1: Difference between revisions
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{{Infobox |
{{Infobox locomotive |
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|name = PRR AA1 |
| name = PRR AA1 |
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| image = PRR AA1 10002.jpg |
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| alt = |
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|caption = PRR AA1 |
| caption = PRR AA1 {{Abbr|No.|Number}} 10002 |
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| powertype = Electric |
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|builder = [[Pennsylvania Railroad]] Altoona Works,<ref name="staufer" /> ''also'' [[Westinghouse Electric Corporation (1886)|Westinghouse]]<ref name="burch" /> |
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| builder = [[Altoona Works]] and [[Westinghouse Electric Corporation (1886)|Westinghouse]] |
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|builddate = 1905 |
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| ordernumber = |
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|serialnumber = EZN-7, EZN-8<ref name="kc">{{cite web |last = Britton |first = Jerry |title = Electric Class Cross Reference |url = http://kc.pennsyrr.com/motiveops/elec_xref.php |work = Keystone Crossings |accessdate = 2008-05-03 }}</ref> |
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| serialnumber = EZN-7, EZN-8<ref name="kc">{{cite web |last = Britton |first = Jerry |title = Electric Class Cross Reference |url = http://kc.pennsyrr.com/motiveops/elec_xref.php |work = Keystone Crossings |access-date = 2008-05-03 }}</ref> |
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|totalproduction = 2<ref name="staufer" /> |
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| buildmodel = |
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| builddate = 1905 |
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|wheeldiameter = {{convert|56|in|mm|abbr=on}}<ref name="burch" /> |
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| totalproduction = 2 |
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|wheelbase = Truck: {{convert|8.5|ft|abbr=on}}<br />Overall: {{convert|26|ft|abbr=on}}<ref name="burch" /> |
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| rebuilder = |
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|locoweight = 10001: {{convert|87|short ton|abbr=on}}<br />10002: {{convert|97|short ton|abbr=on}}<ref name="burch" /> |
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| rebuilddate = |
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|electricsystem = 600 V DC<ref name="burch" /> |
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| numberrebuilt = |
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|collectionmethod = [[Third rail]] |
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| aarwheels = B-B |
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| uicclass = |
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| gauge = {{track gauge|56.5 in|allk=on}} |
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| trucks = |
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| bogies = |
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| wheeldiameter = {{convert|56|in|mm|0|abbr=on}} |
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| trailingdiameter = |
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| minimumcurve = |
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| wheelbase = |
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{{Plainlist| |
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* Truck: {{convert|8.5|ft|2|abbr=on}} |
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* Overall: {{convert|26|ft|2|abbr=on}} |
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}} |
}} |
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| length = |
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[[File:PRR AA1 10001.jpg|thumb|300px|right|PRR AA1 #10001<ref name="burch" />]] |
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| width = |
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The [[Pennsylvania Railroad]]'s class '''AA1''' comprised two experimental electric locomotives constructed in 1905 by [[Westinghouse Electric Corporation (1886)|Westinghouse]] at the start of the PRR's electrification project.<ref name="staufer">{{cite book |
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| height = |
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| frametype = |
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| axleload = |
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| weightondrivers = |
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|id = LOC 62-20878 |
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| locoweight = |
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{{Plainlist |
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|publisher = Staufer |
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|* 10001: {{convert|87|short ton|t LT|abbr=on}} |
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|page = 247 |
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* 10002: {{convert|97|short ton|t LT|abbr=on}} |
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}}</ref><ref name="burch">{{cite book |
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}} |
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|last = Burch |
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| sandcap = |
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| powersupply = |
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|title = Electric Traction for Railway Trains |
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| electricsystem = {{nowrap|600 V DC}} [[Third rail]] |
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|url = http://books.google.com/books?id=k3k5AAAAMAAJ |
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| collectionmethod = [[Contact shoe]] |
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|year = 1911 |
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| alternator = |
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|publisher = [[McGraw-Hill]] |
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| generator = |
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|location = New York |
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| tractionmotors = |
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| headendpower = |
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| transmission = |
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}}</ref> |
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| multipleworking = |
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They were testbeds for larger locomotives to come. Both were of [[AAR wheel arrangement#B-B|B-B]] [[wheel arrangement]] in the [[Association of American Railroads]] classification scheme; each had two [[bogie|trucks]], each with two axles and four wheels. |
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| maxspeed = |
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| poweroutput = |
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| tractiveeffort = |
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| factorofadhesion = |
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| trainheating = |
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| locobrakes = |
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| locobrakeforce = |
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| trainbrakes = |
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| safety = |
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| operator = |
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| operatorclass = |
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| powerclass = |
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| numinclass = |
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| fleetnumbers = |
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| officialname = |
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| nicknames = |
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| axleloadclass = |
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| locale = |
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| deliverydate = |
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| firstrundate = |
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| lastrundate = |
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| retiredate = |
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| withdrawndate = |
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| preservedunits = |
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| restoredate = |
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| scrapdate = |
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| currentowner = |
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| disposition = |
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| notes = <ref>{{Harvnb|Burch|1911|p=322}}</ref> |
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}} |
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The [[Pennsylvania Railroad]]'s class '''AA1''' comprised two experimental [[electric locomotives]] constructed in 1905 by the company's own [[Altoona Works]] with the assistance of [[Westinghouse Electric Corporation (1886)|Westinghouse]]. Intended as testbeds as the PRR began its [[Pennsylvania Railroad#Electrification|electrification project]], both locomotives remained service into the 1930s. |
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== History == |
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The first, #10001, used gearless motors attached to the axles. The second, #10002, was built with motors mounted in the truck frames and geared to the wheels. Later on it was given one gearless truck.<ref name="burch" /> |
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In the early 1900s, the Pennsylvania Railroad embarked on a major program to improve its access to [[New York City]]. The [[New York Tunnel Extension]] comprised tunnels and approaches from [[New Jersey]] and [[Long Island]] to [[Midtown Manhattan]], leading to the PRR's massive new station, [[Pennsylvania Station (1910–1963)|New York Penn Station]]. It was obvious that [[steam locomotive]]s would be inappropriate for prolonged operation underground, so the PRR began experimenting with 600 V DC electrification, which had already been placed into operation elsewhere by the [[Baltimore and Ohio Railroad]] and the [[New York, New Haven and Hartford Railroad]].<ref>{{Harvnb|Reich|1962|p=28}}</ref> |
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The Pennsylvania Railroad constructed the two locomotives in its [[Altoona Works]] as testbeds for larger locomotives to come. Both were of [[AAR wheel arrangement#B-B|B-B]] [[wheel arrangement]] in the [[Association of American Railroads]] classification scheme; each had two [[bogie|trucks]], each with two axles and four wheels.<ref>{{Harvnb|Reich|1962|pp=28–29}}</ref> |
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Both locomotives proved unstable at speed, pounding the track with high lateral forces. A competing experimental unit, [[PRR Odd D 10003|"Odd D" #10003]], of [[4-4-0]] wheel arrangement in [[Whyte notation]] or 2-B in the AAR scheme, proved much more stable. It was selected as the basis for the production model, which became the [[PRR DD1]] [[twin-unit]] locomotive. |
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The first, {{Abbr|No.|Number}} 10001, used direct geared traction motors. The second, {{Abbr|No.|Number}} 10002, was built with motors mounted in the truck frames and geared to the wheels.<ref>{{Harvnb|Burch|1911|p=321}}</ref> Later on it was given one gearless truck.<ref>{{Cite book|url=https://issuu.com/rbp714/docs/pennsy_power__steam_and_electric_lo|title=Pennsy Power|last=Staufer|first=Alvin F.|publisher=Standard Print & Pub. Co.|year=1962|location=Carrollton, Ohio|pages=247}}</ref> |
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At low speeds in switching service, however, the locomotives were acceptable. The first, #10001, was renumbered #3950 and was sold to the (PRR subsidiary) [[Long Island Rail Road]] in 1916. Numbered 323 on that road and nicknamed "Phoebe", the locomotive was in use until 1937 when it was scrapped.<ref>{{cite book |
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|last = Keller |
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Both locomotives proved unstable at speed, pounding the track with high lateral forces. A competing experimental unit, [[PRR Odd D 10003|"Odd D" #10003]], of [[4-4-0]] wheel arrangement in [[Whyte notation]] or 2-B in the AAR scheme, proved much more stable. It was selected as the basis for the production model, which became the [[PRR DD1]] [[twin-unit]] locomotive.<ref>{{Harvnb|Reich|1962|p=29}}</ref> |
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|first = David |
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|author2=Steven Lynch |
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At low speeds in switching service, however, the locomotives were acceptable. The first, #10001, was renumbered #3950 and was sold to the (PRR subsidiary) [[Long Island Rail Road]] in 1916. Numbered 323 on that road and nicknamed "Phoebe", the locomotive was in use until 1937 when it was [[scrap]]ped.<ref>{{Harvnb|Keller|Lynch|2005|p=12}}</ref> |
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|title = Revisiting the Long Island Rail Road |
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No. 10002, meanwhile, was renumbered #3951 and continued in service on the PRR.<ref>{{Harvnb|Staufer|Pennypacker|1968|p=124}}</ref> |
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|url = |
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|year = 2005 |
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== Notes == |
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|publisher = Arcadia |
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{{Reflist|30em}} |
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|location = |
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|isbn = 0-7385-3829-9 |
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|quote = |
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|page = 12 |
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}}</ref> |
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No. 10002, meanwhile, was renumbered #3951 and continued in service on the PRR.<ref name="staufer2">{{cite book |
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|last = Staufer |
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|first = Alvin F. |
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|title = Pennsy Power II |
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|id = LOC 62-20872 |
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|year = 1968 |
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|publisher = Staufer |
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|page = 124 |
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}}</ref> |
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== References == |
== References == |
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* {{Burch Electric Traction }} |
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<references /> |
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* {{cite book | last1=Keller | first1=David | last2=Lynch | first2=Steven | title=Revisiting the Long Island Rail Road | year=2005 | publisher=Arcadia | isbn=0-7385-3829-9 }} |
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* {{cite magazine | last=Reich | first=Sy | title=Rollcall of Pennsy Electrics | magazine=[[Railroad Magazine]] | date=October 1962 | volume=73 | issue=6 }} |
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* {{Staufer-Pennsy Power II}} |
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==External links== |
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{{commons category|PRR AA1}} |
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* [http://www.trainsarefun.com/lirr/early-electric-engines/earlylirr-electric-engines.htm LIRR Early Electric Engines (TrainsAreFun.com)] |
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{{WH electrics}} |
{{WH electrics}} |
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[[Category:Pennsylvania Railroad locomotives|AA1]] |
[[Category:Pennsylvania Railroad locomotives|AA1]] |
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[[Category:Long Island Rail Road]] |
[[Category:Long Island Rail Road]] |
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[[Category: |
[[Category:600 V DC locomotives]] |
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[[Category:Experimental locomotives]] |
[[Category:Experimental locomotives]] |
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[[Category:Westinghouse locomotives]] |
[[Category:Westinghouse locomotives]] |
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[[Category:Electric locomotives of the United States]] |
[[Category:Electric locomotives of the United States]] |
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[[Category:Scrapped locomotives]] |
[[Category:Scrapped locomotives]] |
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[[Category:Standard gauge |
[[Category:Standard gauge locomotives of the United States]] |
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{{electric-loco-stub}} |
{{electric-loco-stub}} |
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Latest revision as of 16:21, 7 July 2024
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 PRR AA1 No. 10002 | |||||||||||||||||||
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The Pennsylvania Railroad's class AA1 comprised two experimental electric locomotives constructed in 1905 by the company's own Altoona Works with the assistance of Westinghouse. Intended as testbeds as the PRR began its electrification project, both locomotives remained service into the 1930s.
History
[edit]In the early 1900s, the Pennsylvania Railroad embarked on a major program to improve its access to New York City. The New York Tunnel Extension comprised tunnels and approaches from New Jersey and Long Island to Midtown Manhattan, leading to the PRR's massive new station, New York Penn Station. It was obvious that steam locomotives would be inappropriate for prolonged operation underground, so the PRR began experimenting with 600 V DC electrification, which had already been placed into operation elsewhere by the Baltimore and Ohio Railroad and the New York, New Haven and Hartford Railroad.[3]
The Pennsylvania Railroad constructed the two locomotives in its Altoona Works as testbeds for larger locomotives to come. Both were of B-B wheel arrangement in the Association of American Railroads classification scheme; each had two trucks, each with two axles and four wheels.[4]
The first, No. 10001, used direct geared traction motors. The second, No. 10002, was built with motors mounted in the truck frames and geared to the wheels.[5] Later on it was given one gearless truck.[6]
Both locomotives proved unstable at speed, pounding the track with high lateral forces. A competing experimental unit, "Odd D" #10003, of 4-4-0 wheel arrangement in Whyte notation or 2-B in the AAR scheme, proved much more stable. It was selected as the basis for the production model, which became the PRR DD1 twin-unit locomotive.[7]
At low speeds in switching service, however, the locomotives were acceptable. The first, #10001, was renumbered #3950 and was sold to the (PRR subsidiary) Long Island Rail Road in 1916. Numbered 323 on that road and nicknamed "Phoebe", the locomotive was in use until 1937 when it was scrapped.[8] No. 10002, meanwhile, was renumbered #3951 and continued in service on the PRR.[9]
Notes
[edit]- ^ Britton, Jerry. "Electric Class Cross Reference". Keystone Crossings. Retrieved 2008-05-03.
- ^ Burch 1911, p. 322
- ^ Reich 1962, p. 28
- ^ Reich 1962, pp. 28–29
- ^ Burch 1911, p. 321
- ^ Staufer, Alvin F. (1962). Pennsy Power. Carrollton, Ohio: Standard Print & Pub. Co. p. 247.
- ^ Reich 1962, p. 29
- ^ Keller & Lynch 2005, p. 12
- ^ Staufer & Pennypacker 1968, p. 124
References
[edit]- Burch, Edward Parris (1911). Electric Traction for Railway Trains. New York: McGraw-Hill. OCLC 854497122.
- Keller, David; Lynch, Steven (2005). Revisiting the Long Island Rail Road. Arcadia. ISBN 0-7385-3829-9.
- Reich, Sy (October 1962). "Rollcall of Pennsy Electrics". Railroad Magazine. Vol. 73, no. 6.
- Staufer, Alvin F.; Pennypacker, Bert (June 1968). Pennsy Power II: Steam Diesel and Electric Locomotives of the Pennsylvania Railroad (1st ed.). Medina, Ohio: Alvin F. Staufer. ISBN 978-0944513057.
External links
[edit]
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